//
// StorePathMapper
//
// Copyright (C) jextra.net.
//
//  This file is part of the Nubbin Library.
//
//  The Nubbin Library is free software; you can redistribute it and/or
//  modify it under the terms of the GNU Lesser General Public
//  License as published by the Free Software Foundation; either
//  version 2.1 of the License, or (at your option) any later version.
//
//  The Nubbin Library is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
//  Lesser General Public License for more details.
//
//  You should have received a copy of the GNU Lesser General Public
//  License along with the Nubbin Library; if not, write to the Free
//  Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
//  02111-1307 USA.
//

package net.jextra.nubbinstoreweb;

import javax.servlet.http.*;

/**
 * Convert an HTTP request URL into a store path.
 */
public class StorePathMapper
{
    // ============================================================
    // Enums
    // ============================================================

    public enum Type
    {
        components, 
        versions, 
        entries;
    }

    // ============================================================
    // Fields
    // ============================================================

    private String _componentName;
    private String _versionNumber;
    private String _path;

    // ============================================================
    // Constructors
    // ============================================================

    public StorePathMapper( HttpServletRequest request )
    {
        this( request.getServletPath() );
    }

    public StorePathMapper( String servletPath )
    {
        _path = servletPath;

        // Throw away prefixed /.
        if ( _path.startsWith( "/" ) )
        {
            _path = _path.substring( 1 );
        }

        // Throw away the "action".
        int slash = _path.indexOf( '/' );
        if ( slash >= 0 )
        {
            _path = _path.substring( slash + 1 );
        }
        else
        {
            _path = "";
        }

        String[] strings = _path.split( "/" );

        if ( strings.length > 0 && !strings[0].isEmpty() )
        {
            _componentName = strings[0];
        }

        if ( strings.length > 1 )
        {
            _versionNumber = strings[1];
        }

        StringBuilder builder = new StringBuilder();
        for ( int i = 2; i < strings.length; i++ )
        {
            if ( builder.length() > 0 )
            {
                builder.append( "/" );
            }
            builder.append( strings[i] );
        }
        _path = builder.toString();
    }

    // ============================================================
    // Methods
    // ============================================================

    // ----------
    // public
    // ----------

    public Type getType()
    {
        if ( _componentName == null )
        {
            return Type.components;
        }
        else if ( _versionNumber == null )
        {
            return Type.versions;
        }

        return Type.entries;
    }

    public String getComponentName()
    {
        return _componentName;
    }

    public String getVersionNumber()
    {
        return _versionNumber;
    }

    public String getPath()
    {
        return _path;
    }
}

